sess_time_to_update

[eluser]Satch[/eluser]
I want to turn this off. I tried to set it to a large number but it didn't work. Any suggestions?

Code:

$config['sess_cookie_name']        = 'carwrap';
$config['sess_expiration']        = 72000;
$config['sess_encrypt_cookie']    = FALSE;
$config['sess_use_database']    = TRUE;
$config['sess_table_name']        = 'sessions';
$config['sess_match_ip']        = FALSE;
$config['sess_match_useragent']    = TRUE;
$config['sess_time_to_update']         = 300000;